>> Put it in a mild breeze. Realise why you want balance :-) > 10 x 200g cans of expresso .. > Hmm =A0More coffee eeee =A0eee Wheeeee! :) I've used large steel fruit cans. Metal finally tore - but this was not speed limited and was well exposed. I specified "Coke"cans as they are liable to be more available than most raw materials. A contact tells me that Haiti has many plastic bottles available. Value of "many" as yet unknown. Bottles also tend to be less standardised. It's only an exercise by may yet lead to something. "Real" tests will be with PVC pipe but if available scrap materials can be realistically used so much the better. This is not a substitute for purpose designed and built units but a possible added bonus - as the quality control is lacking and there's no doubt that the feedstock is delicate. R --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .